課程內容
《Healthy eating （Part 4）》
情態動詞表示推測的用法
情態動詞常見慣用法及固定句型（can/could/may/might/must)
一對現在和將來情況的推測，形式為：情態動詞+動詞原形
二對正在發生的情況的推測，形式為：情態動詞+be doing
三對過去發生的情況的推測，形式為：情態動詞+have done
高考真題show
(09重慶）
9.-Hi,Tom.Any idea where Jane is?
-She (C) in the classroom.I saw her there just now.
A shall be B should have been C must be D might have been
(09江蘇）
11.He did not regret saying what he did but felt that he(C) it differently.
A could express
B would express
C could have expressed
D must haved expressed
表示對現在和將來情況的推測，形式：情態動詞+動詞原形
1.應用：表示推測時（C)是正確的句子。
A He can come B May he come? C He could come D Must he come?
2.特別說明：can用于肯定句中表示推測的情況：
The World Wide Web is sometimes jokingly called the World Wide Wait because it (D)be very slow.(2005浙江）
A must B should C will D can
解釋：當表示客觀的（理論）可能性，意義為有時可能時，can可以用于肯定句中表示推測。這種用法常常可以說明人或事物的特征。
1.You (B)be hungry already-you had lunch only two hours ago!(2008浙江）
A wouldn't B can't C mustn't D needn't
2.-Is there a basketball match between the Lakers and the Huston Rockets this evening?(2008江蘇無錫模擬）
-There (A)be.I'll phone the gym and find it out.
A might B should C must D would
二表示對這橫在發生情況的推測，形式為：情態動詞+be doing譯為（可能，一定...）正在.....
例題：
1.(B) he be watching TV now?
A:Yes,he ( )be watching TV now.
B:No,he ( )be watching TV now.
A Must;can;mustn't B Can;must.can't C Can;can;mustn't D May;must;needn't
三 對過去的推測 情態動詞+have done
1.must have done:對過去情況由極大把握的猜測
1.The lights went out.They (must have left)the office.
2.It (must have rained)last night,for the road was quite muddy.
2.May/might have done（無疑問）
1.It is too late.I think he (may have done)to bed.某事可能發生
2.He (may not have finished)the work.某時可能沒發生
3.She was lucky enough.The tiger(might have eaten)her.本來可能發生而沒發生
4.She (might have been eaten)by the tiger.
3.can/could have done
1.You (could have done)it better,but you were too careless.
過去有能力做到而實際上沒有做到
2.Mary met Jack at the airport yesterday afternoon,so she (couldn't have attended)your lecture.
4.Should/ought to have done
1.You (should have done to)the meeting earlier 本該座而未作之事
2.You (shouldn't have told)her the truth.做了不該做的事
5.Needn't have done
.We (needn't have taken)a taxi here,for it was very near to the school.做了沒必要做的事
.注意：didn't need to do:
.I (didn't need to clean)the windows.My brother did it.
沒必要做實際也沒做
特定語境下的態度和語氣
.1.請求兩回答：
Yes,you may/certainly please
May I come in?
No,you mustn't./Please don't.
Yes,you must
Must I do it now?
No,you needn't./don't have to
2.May 祝愿
(May) you succeed.
3.Might 忠告
You have broken two cups.You (might)try to be more careful.
4.Must 偏偏
1.Jouhn,look at the time,(must) you play the piano at such a late hour?
2.Could I have a word with you,mum?
Oh,dear,if you( must).
5.Shall 一、三疑問表請求：
(Shall) the young fellow have a try?
(Shall) I have a second try?
Shall 二、三警告、威脅和許愿：
You (shall) fail if you don't work harder.
You (shall) go out of the room ubless you stop taliking.
You (shall) get a rise if you work harder.
情態動詞常見慣用法：
1.had better do (not do)
2.Would rather do ...than do
3.Can not too/enough
You (can't be too)careful when you are driving.
You (can't)remember (enough)English words.
4.Can but do (只好）
I (can but agree)with you.
5.can't help do sth.
can't but do sth.
can't choose but do 不得不、不能不
I (can't but admire)your courage.
can't help admire
can't choose but admire
6.may/might as well（倒不如、只好）
You might as well do your present job before you find a new one.
7.May well do sth.（很可能）
He may well say so./do that.
1.It is usually warm in my hometown in March,but it(B)be rather cold sometimes.(2008福建）
A must B can C should D would
2.Thank you for all your hard work lat week.I don't think we (B)it without you.(2008山東）
A can manage B could have managed C could manage D can have mansged
3.-Why hasn't the speaker turned up?
-He (B) the flight!I'll find it out at once.
A must have missed B might have missed C might miss D could miss
Oversleeping will never make your dream come true.睡懶覺永遠不會美夢成真。
Homework:
Recite your notes.背誦筆記
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郭老師
女，中教高級職稱
市名師、市學科帶頭人、市骨干教師。有豐富的教學經驗和與學生的溝通交流經驗。
